From 9d88c67484dad057410ec7d5fe8bf2b7cdedba45 Mon Sep 17 00:00:00 2001
From: Walter Bender <walter.bender@gmail.com>
Date: Mon, 02 Jul 2012 21:08:09 +0000
Subject: Add box and stack proto blocks to palette on load/copy; Don't create duplicate start or action blocks with copy/paste

---
(limited to 'TurtleArt/tautils.py')

diff --git a/TurtleArt/tautils.py b/TurtleArt/tautils.py
index 862554b..6871f35 100644
--- a/TurtleArt/tautils.py
+++ b/TurtleArt/tautils.py
@@ -1,4 +1,4 @@
-#Copyright (c) 2007-8, Playful Invention Company.
+#copyright (c) 2007-8, Playful Invention Company.
 #Copyright (c) 2008-12, Walter Bender
 
 #Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -766,6 +766,8 @@ def find_top_block(blk):
     ''' Find the top block in a stack. '''
     if blk is None:
         return None
+    if blk.connections is None:
+        return blk
     if len(blk.connections) == 0:
         return blk
     while blk.connections[0] is not None:
@@ -777,6 +779,8 @@ def find_bot_block(blk):
     ''' Find the bottom block in a stack. '''
     if blk is None:
         return None
+    if blk.connections is None:
+        return blk
     if len(blk.connections) == 0:
         return blk
     while blk.connections[-1] is not None:
--
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